Stove or furnace



EDVIN DEWHURS'I MOLEAN, OF MARISSA, ILLINOIS.

sToi/E 0R FURNACE.

SPECIFICATION forming part of Letters Patent No. 600,795, dated March15, 1898. lppla'on 5181i February 25, 1897. Serial No. 6 25,007. (Nomodel.)

.To all whom t may concern,.-

Be it known that I, EDWIN DEwHURsr Mc- LEAN, a citizen of the UnitedStates, residing at Marissa, St. Clair county, State of Illinois, haveinvented a certain new and useful Improvement in Stoves or Furnaces, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming a part of thisspecification.

My invention relates to that class of stoves or furnaces capable ofemployment as either downdraft or updraft, and is an improvement on thedevice set forth in my Patent No. 574,210, dated December 29, 1896.

My in vention consists in features of novelty hereinafterfull ydescribed, and pointed out in the claims.

Referring to the drawings, Figure I illustrates a vertical sectionthrough the central portion of the stove or furnace, the section beingtaken on the line indicated by I I, Fig. II. Fig. II is a top View ofthe stove-base from which the remainder of the stove or furnace has beenremoved. Fig. III illustrates a horizontal section taken on line IIIIII, Fig. I.

In the drawings, 1 designates the base, on which is seated a pot 2, thatis surmounted by the casing 3.

The stove or furnace may be fed through a side door 4, or may beVse1ffed by employing a magazine 6, surmounted by a cover 6, located ontop of the casing.

7 designates a shaking-grate mounted on brackets 8, secured to thecasing by rivets or other suitable means. The shaking-grate is providedwith an arm 9, designed to be eni gaged by a suitable implement insertedthrough an opening l0, protected by a door The opening l0 may also beemployed to admit air to the interior of the stove or furnace both aboveand beneath the grate.

12 designates a basket-grate composed of sections 12, each section'having an upper solid portion 12b, said portions constituting the firepotlining.

13 designates an outlet in the rear of the casing, through which theproducts of combustion pass either horizontally or downward, asindicated by the arrows.

14 designates the tire-chamber, and 15 the combustion-chamber beneaththe grates.-

16 designatesa main flue extending from the base, and 17 an auxiliaryiiue located between the fire-chamber and the main flue, the two yfinesbeing separated by a division-wall 18, said wall extending down into thecombustion-chamber to a considerable distance beneath the grates in thesame manner and for thesame purpose as set forth in mypatenthereinbefore mentioned. The divisionwall 18 is formed with an offsetportion 18 at its upper end and an opening 19, that permitscommunication between the iiues or from the iire-chamber I4 to the mainfine.

2O designates a single double-winged damper` pivotally hung intermediateof its edges at the upper end of the division-wall 18. This damper isarranged to be swung into the position shown by full lines in thedrawings, where it closes the opening I9, or swung into the positionindicated in dotted lines, Fig. I, where it prevents upward passagethrough the main iiue from the combustionchamber, closes the upper endof the auxiliary iiue, and causes the products of combustion to passdirectly from the fire-chamber I4 to the upper end of the main iiue andout to the chimney.

One end of theshaft of the damper extends to the exterior of the stoveor furnace and has attached to itan operating crank 2l, by means ofwhich the damper may be operated, the crank being provided with a knob22. On the crank is a boss 23, to which is connected a rod 24, thatpasses through the stove or furnace casing and a tube 25 therein to thefront of the stove or furnace. The forward end of the rod 24 is providedwith a knob 26, that may be grasped to operate the damper from in frontof the stove or furnace.

27 designates the ash-pit door, which carries on its inner side atapered lug 23.

29 designates a rocking rod pivotally mount` ed in hangers 30, attachedto the base l. The

forward end of this rocking rod has an offset arm 31, and the rear endis formed into a crank-arm 32, provided with an eye 33.

34 designates a rod passing through the main iiue, having at its lowerend an eye 35, that interlocks with the eye 33 of the crank- ICO arm 32.The upper end of the rod 34E is formed into a loop 36, that receives alink 37.

38 is an eye attached to the damper 20, in Which eye the link, 37 isseated.

The purpose of the damper connection leading to the ash-pit door is toprovide i'or the automatic opening of the damper on the opening of theash-pit door, a result accomplished by virtue of the Weight of theparts, the object of causing the damper to automatically operate on theopening of the ash-pit door being to cause the products of combustion topass directly from the iire-chamber to the main lue on the openin g ofthe ash-pit door. Otherwise such products of combustion would descend onthe opening of the ash-pit door and escape into the room containin g thestove or furnace. When the ash-pit door is again closed, the rocking rod2S) is turned by the tapered lug 28 striking the arm 3l, and thecrank-arm 32 is elevated7 thereby raising the rod 34, after which thedamper 2O may be operated by grasping the knob 22 or the knob 2G.

I claim as my inventionl. In a stove or` furnace, the combination of acasing, an outlet from said casing, a main flue, an auxiliary lue7 saidoutlet being arranged to communicate With both of said iiues, a singledouble-Winged damper commonto both iiues and arranged to control both ofsaid lines, an ash-pit door, and means whereby said damper is operatedon the opening of said ash-pit door, substantially as set forth.

2. In a stove or furnace, the combination of a casing, a main flue, anauxiliary flue, a sin gle double-Win ged damper common to both iiues andarranged to control both of said iiues, a rod loosely connected to saiddamper, a rocking rod pivotally mounted at the base of the stove orfurnace and connected to said rod. an ash-pit door, and a tapered lugcarried by said door, arranged to operate said rocking rod,substantially as set forth.

EDWIN DEVHURST MCLEAN.

In presence of- E. S. KNIGHT, N. FINLEY.

